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PDF STBB3JCC Data sheet ( Hoja de datos )
| Número de pieza | STBB3JCC | |
| Descripción | high efficiency single inductor buck-boost DC-DC converter and high brightness WLED driver | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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STBB3JCC
2 A, high efficiency single inductor buck-boost DC-DC converter
and high brightness WLED driver
Datasheet - production data
Flip Chip 20, pitch = 0.4 mm
Features
• 100 mV feedback signal
• Input voltage range from 1.8 V to 5.5 V
• 2 A output current at 3.3 VOUT in buck mode
(VIN= 3.6 V to 5.5 V)
• 800 mA output current at 3.3 VOUT in boost
mode (VIN ≥ 2.0 V)
• Typical efficiency higher than 94%
• Automatic transition between step-down and
boost mode
• Adjustable output voltage from 1.2 V to 5.5 V
• Power save mode (PS) at light load
• 2.0 MHz fixed switching frequency
• Adjustable switching frequency up to 2.4 MHz
(by external synchronous square signal)
• Device quiescent current less than 50 μA
• Load disconnect during shutdown
• Shutdown function and soft-start
• Shutdown current < 1 μA
• Available in Flip Chip 20, pitch = 0.4 mm
Applications
• HB WLED driver
• Single cell Li-Ion, two-cell and three-cell
alkaline, Ni-MH powered devices
• Memory card supply
• Tablet, smartphones
• Digital cameras
Description
The STBB3JCC is a fixed frequency, high
efficiency, buck-boost DC-DC converter which
provides output voltages from 1.2 V to 5.5 V
starting from input voltage from 1.8 V to 5.5 V.
Thanks to very low sensing voltage, only 100 mV
and very low RDS(on) of integrated power
MOSFET, it achieves very high efficiency driving
high brightness white LED in constant current
mode. The device can operate with input voltages
higher than, equal to, or lower than the output
voltage making the product suitable for cell
lithium-Ion applications where the output voltage
is within the battery voltage range. The MODE pin
allows the selection between auto mode and
forced PWM mode, taking advantage from either
lower power consumption or best dynamic
performance.The device also includes soft-start
control, thermal shutdown, and current limit. The
STBB3JCC is packaged in Flip Chip 20 bumps
with 2.5 x 1.75 mm.
Order code
STBB3JCCR
Table 1. Device summary
Part number
Marking
Packing
STBB3JCC
BB3CC
Flip Chip20
December 2015
This is information on a product in full production.
DocID025425 Rev 5
Output voltage
Adjustable
1/27
www.st.com
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1 page  
STBB3JCC
2 Block diagram
Figure 2. Block diagram adjustable
SW1
SW2
V IN_SW
Block diagram
VOUT
FB
GND
Σ OSC
G ate
Driver
DMD
-
EA
+
VR E F and
S oft-start
VS UM
C-OMP 1
B urst
C ontrol
LOG IC
CONTR OL
UVLO
S HUT
DOW N
OS C
OTP
OS C
-
DMD
VS UM
DE VIC E
CONTR OL
V IN_A
EN
MO D E
AM16822v1
DocID025425 Rev 5
5/27
5 Page 
STBB3JCC
Typical performance characteristics
Figure 5. Efficiency vs. output current (power Figure 6. Efficiency vs. output current (power
save mode enabled VOUT = 3.3 V)
save mode disabled VOUT = 3.3 V)
AM16825v1
Figure 7. Efficiency vs. output current
(PWM/auto mode VIN = 1.8 V)
AM16826v1
Figure 8. Efficiency vs. output current
(PWM/auto mode VIN = 3.6 V)
AM16827v1
AM16828v1
Figure 9. Efficiency vs. output current
(PWM/auto mode VIN = 5.0 V)
Figure 10. Maximum output current vs. input
voltage
AM16829v1
DocID025425 Rev 5
11/27
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet STBB3JCC.PDF ] | |
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